A woman who does something so dumb it makes you realize that she is only good for one thing and doesn't have the ability to serve any other purpose on earth.
You are driving and a woman cuts you off because she is in a hurry. She hits a sign and gets a flat tire and a bent rim in the result of her actions. This is a "Twatacocktus"
You yell in rage "You stupid Twatacocktus!"